Ship&#39;s anchor.



No. 721, 3.. PATENTED MAR, 3, 1-903.-

H.i 'J. BROOKE. 6 SHIPS ANCHOR.

APPLICATION FILED JULY 1. 1902. I0 nonnn.

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UNITED STATES PATENT OFFICE.

HENRY JAMES BROOKE, OF SVENDBORG, DENMARK.

SHIPS ANCHOR.

SPECIFICATION forming part of Letters Patent No. 721,663, dated March 3, 1903. Application filed July 1, 1902'. Serial no. 114,026. (No model.)

To all whom it may concern:

Be it known that I, HENRY JAMES BROOKE, retired engineer, a citizen of Great Britain, residing at Svendborg, Island of 'lunen in the Kingdom of Denmark, (whose post-office address is 49 Vim melskaftet, Copenhagen, Denmark,) have invented certain new and useful Improvements in Ships Anchors; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawing, and to letters of reference marked thereon, which forms a part of this specification.

The present invention refers to improvements in ships anchors; and its subject is an automatic stockless four-armed anchor in which one pair of arms is rigidly fastened to the shank, while the other pair is'arranged so as to be capable of moving up the lower part of the shank, which is formed like a screw with a great pitch. The length of the screwed part of the shank and the pitch are arranged in such a manner that the movable pair of arms will shift from a cross position when resting on the fixed pair of arms to a parallel position after having made onefourth of a revolution in moving from the cross position to the extremity of the screwed part of the shank. The advantage of this arrangement is that the anchor is capable of lying flat down on the deck and of automatically assuming the cross position when heaved overboard, so that at least two flukes must take hold.

The invention is illustrated in the accompanying drawing, showing ananchor of the described type seen from above as lying on deck, with the two pairs of arms parallel to oneanother.

a is the shank; b, the fixed pair of arms; 0, the movable pair.

The lower part of the shank d is shaped like a screw with great pitch, on which the boss e of the movable pair of arms a, like a nut, is capable of turning. The screwed part dot the shank, which is preferably made slightly conical from the base upward, can

be formed simply by twisting a square bar. 50

A fixed collar h on the shank limits the movement of the movable pair of arms. The fixed pair of arms is attached in a suitable manner to the lower extremity of the shank, which is also provided with a ring f. The upper extremity of the shank is provided with a ring gin the usual manner.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In an anchor, a shank having a spirally- I disposed guideway upon its lower end and a pair of arms rigidly securedto the end of the shank in combination with a pair of movable arms having an aperture adapted to loosely receive said shank and move upon said guideway whereby when both pairs of arms are in contact with each other they will be disposed at right angles and when said movable arms are moved up the shank in said guideway they will be turned by said guideway and disposed substantially parallel with the fixed arms as and for the purpose set forth.

2. The herein-described anchor comprising a shank having a spirally-disposed guideway upon its lower end; a pair of arms fixedly secured to the extreme lower end of the shank and a pair of movable arms disposed around said shank in cooperation with said guideway whereby when the arms are in contact with each other they will be substantially at right angles and when said arms are separated they will occupy substantially the same plane and means carried by the shank to connect it with the cable all substantially as specified and for the purpose set forth.

In testimony that I claim the foregoingas my invention I have signed my name inpresence of two subscribing witnesses.

HENRY JAMES BROOKE.

Witnesses: I v

J. C. JAcoBsEN, ERNEST BOUTARD. I 

